HEAT EXCHANGER FOR CONDENSATION IN CLOTHES DRYING AND CLOTHES DRYING SYSTEM AND CLOTHES DRYER

摘要

A heat exchanger for condensation in drying and clothes drying system as well as the clothes dryer and drying method thereof are disclosed. A heat exchanger (1) is an external air-cooled heat exchanger, which comprises two air channels going towards different directions and not connecting with each other, respectively a condensing wind channel (11) and an external air channel (12), each air channel is composed of a plurality of air chambers, the air chambers of two air channels are arranged by interval successively and alternatively and between each two neighboring air chambers of the same air channel is an air chamber of the other air channel; A clothes dryer comprises a clothes tub (2), an air outlet (21), a filter (3), a drying fan (5), a heating unit (6) and an air inlet (22) as well as a water collection box (4), in which, the air outlet (21) is connected to the heat exchanger (1), the heat exchanger (1) is connected to the water collection box (4), the water collection box (4) is connected to the air inlet (22), the filter (3) is arranged between the air outlet (21) and the heat exchanger (1), and the drying fan (5) and the heating unit (6) are arranged between the water collection box (4) and the air inlet (22) in turn. The invention is characterized by a simple structure, a low production cost and high heat exchange efficiency.